Nitrogen, Phosphorus, and Suspended-Sediment Loads and Trends measured in Nine Chesapeake Bay Tributaries: Trends in Annual Loads, Water Years 1985 - 2015
Dates
Publication Date
2016
Start Date
1985-10-01
End Date
2015-09-30
Citation
Moyer, D.L., 2016, Nitrogen, Phosphorus, and Suspended-Sediment Loads and Trends measured in Nine Chesapeake Bay Tributaries: Trends in Annual Loads, Water Years 1985-2015: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7Q81B5N.
Summary
Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the nine Chesapeake Bay River Input Monitoring (RIM) stations for the period 1985 through 2015. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the nine RIM watersheds. When summed, the loads from the nine RIM stations represents the total load delivered from nearly eighty-percent of the bay watershed. To determine [...]
Summary
Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the nine Chesapeake Bay River Input Monitoring (RIM) stations for the period 1985 through 2015. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the nine RIM watersheds. When summed, the loads from the nine RIM stations represents the total load delivered from nearly eighty-percent of the bay watershed. To determine the trend in loads, the annual load results are flow normalized to integrate out the year-to-year variability in river discharge. The trend in load is derived from the flow-normalized load timeseries and represents the change in load resulting from changes in sources, delays associated with storage or transport of historical inputs, and (or) implemented management actions.
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RIM_Trends_in_Annual_Loads_Water_Years_1985_2015_Metadata.xml Original FGDC Metadata
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9.17 KB
application/fgdc+xml
RIM2015_TrendTable.csv
15.29 KB
text/csv
Purpose
The purpose of this data set is to communicate the trends (or) total change in annual loads of nitrogen, phosphorus, and suspended-sediment being generated across the nontidal portion of the bay watershed.
